CM6571 Datasheet, PDF (59/63 Pages) C-Media Electronics – USB 2.0 full speed-compliant

CM6571
USB Audio Sound Chip
Audio Precision
A-D FREQUENCY RESPONSE
12/29/11 15:22:58 Audio Precision
A-D THD+N vs FREQUENCY
05/04/12 17:46:26
+0.02+30
-0.138
-0.5
dx=4.30250 kHz
dy=-0.161 dB
d
-1
B
F
-1.5
S
-2
-2.5
-3
20
50
100
200
500
1k
2k
5k 8.5521501k2.8552k0k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Yellow Solid
1
DSP Anlr.Level A Left
1
2
Cyan Solid
1
DSP Anlr.Level B Left
+0
-20
-40
d
B
-60
F
S
-80
-100
-120
20
50
100
200
500
1k
2k
5k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Yellow Solid
1
DSP Anlr.Ampl B Left
Vista-A-D Crosstalk_R.at27
10k 20k
Vista-A-D Frequency Response.at2c
FIGURE 25. 96K/24BIT, MICROPHONE IN, PASSBAND RIPPLE
FIGURE 26. 96K/24BIT, MICROPHONE IN, CHANNEL SEPARATION R
Audio Precision
A-D THD+N vs FREQUENCY
05/04/12 17:45:46 Audio Precision
A-D THD+N vs FREQUENCY
05/04/12 15:11:46
+0
+0
-20
-20
-40
d
B
-60
F
S
-80
-40
d
B
-60
F
S
-80
-100
-100
-120
20
50
100
200
500
1k
2k
5k
Hz
Sweep Trace Color Line Style Thick Data
Axis Comment
1
1
Yellow Solid
1
DSP Anlr.Ampl A Left
Vista-A-D Crosstalk_L.at27
10k 20k
-120
20
50
100
200
500
1k
2k
5k
10k 20k
Hz
Sweep Trace Color
Line Style Thick Data
Axis Comment
1
1
Red
Solid
1
DSP Anlr.THD+N Ampl A Left
1
2
Magenta Solid
1
DSP Anlr.THD+N Ampl B Left
Vista-A-D THD+N.at2c
FIGURE 27. 96K/24BIT, MICROPHONE IN, CHANNEL SEPARATION L
FIGURE 28. 96K/24BIT, LINE IN, THD+N
Revised: Nov. 2012
Page 59 / 63
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